90 THE CANADIAN ENTOMOLOGIST. 



men, breast and legs piceous-brown ; the knees, outer edges of the 

 tibiae, broad hind margins of the ventral segments and valve, and the 

 base of the- plates, whitish. In pale examples the legs are fulvous and 

 the venter and plates almost uniformly ashen-grey. Length, 4 mm. 



Female : Larger. Grey tinged with fulvous-yellow. Elytra con- 

 colorous, subhyaline, with inconspicuous nervures, and with the head, 

 pronotum and scutellum irregularly mottled with brown ; the basal angles 

 of the latter, blackish ; punctures concolorous and less distinct than in 

 the male. Legs and all beneath brown, the outer surface of the femora 

 and the tibiae more or less invaded with fulvous ; the abdominal segments 

 and genital pieces broadly margined with whitish ; or the lower surface 

 may be entirely pale yellow with no trace of the brown markings. 

 Length, 5 mm. 



Colorado. Described from two male and live female examples 

 collected among the Rocky Mountains by Prof C. P. Gillette, This 

 sombre species seems to be very unstable in its colouring, varying from a 

 uniform pale yellow beneath to deep brown banded and marked with 

 whitish. The females are well distinguished by a peculiar dusky mottled 

 appearance above and the evenly punctured head ; and the dusky basal 

 angles of the scutellum in both sexes. 



3. Agallia constricta, Jl. sp. 



Closely allied to A. 4-punctata, Prov., but smaller and more slender. 

 Length, 3-3/4 mm. 



This species can best be characterized by a comparison with 

 4-piinctata. Female : Face a little more elongated than in that species ; 

 the front more gradually narrov/ed to the apex and not so broad at the 

 base of the clypeus ; clypeus more narrow and slender ; outer edge of 

 the cheek less deeply excavated under the eye, the edge between the eye 

 and outer angle shorter, and the angle less prominent. Pronotum pro- 

 portionately longer, with the latero-posterior margin distinctly longer and 

 the posterior angles more prominent. Elytra narrower, especially toward 

 the apex, the costa not so strongly arcuated, the apical areoles longer and 

 narrower. Last ventral segment more produced and narrower behind, 

 outer angles much depressed against the base of the pygofers, subtecti- 

 form, with a triangular flat basal area. In ^-ptuictata there is a small 

 oval depression on either side scarcely invading the basal half of the 

 segment and leaving a central ridge and usually the apical margin 



